12001691 has 8 divisors (see below), whose sum is σ = 13169520. Its totient is φ = 10868832.

The previous prime is 12001667. The next prime is 12001697. The reversal of 12001691 is 19610021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12001691 - 2¹⁴ = 11985307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12001697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8021 + ... + 9398.

It is an arithmetic number, because the mean of its divisors is an integer number (1646190).

Almost surely, 2^12001691 is an apocalyptic number.

12001691 is a deficient number, since it is larger than the sum of its proper divisors (1167829).

12001691 is a wasteful number, since it uses less digits than its factorization.

12001691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17485.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 12001691 is about 3464.3456813661. The cubic root of 12001691 is about 228.9536019599.

The spelling of 12001691 in words is "twelve million, one thousand, six hundred ninety-one".